VBScript If Statement
One of the most common programming tools that is required to write any kind of
program is the If Statement. This lesson will give you the basic rundown of how
to implement an If Statement in VBScript.
Making decisions is a tiring process, so it's nice to know that you can make
your program make decisions for you if you tell it what it needs to pay attention to.
An If Statement is a mechanism programmers have been using for quite some time
that will execute a block of code IF conditions are true.
For example, you may want to print out "Is someone having a case of the Mondays?" on your
web site every Monday morning. Your If Statement would check to see if the day
was a Monday and if it was (true) then it would execute the code to print out
that annoying line of text.
VBScript If Statement: Syntax
In this lesson we will be creating a simple VBScript If Statement that checks to
see if a number stored in the variable myNumber is equal to 7. If this is true then it
will execute a document.write function to print some text to the browser.
myNumber = 7
If myNumber = 7 Then
myNumber = 100343
If myNumber = 7 Then
document.write("You're a winner!")
This example show that in our first If Statement myNumber is indeed equal to 7 and the
block of code that prints out "Lucky 7!" is executed. However, we then set myNumber equal to something that is
not 7 (100343) and check with a second If Statement and the block of code that should print out
"You're a winner!" is not executed.
The code that resides within an if statement is only executed if the condition statement of that
If Statement is True.
VBScript If Statement: Else
Sometimes you would like to have code executed with something is true and when something is false.
For example, if you wanted to wear a T-shirt if the temperature was above 70 and a long-sleeved shirt if
it was 70 or less. This action to be taken if the conditional statement is false (that is, the temperature is not
above 70 degrees) is referred to in programming speak as the Else clause of the If Statement.
If something is true I want to do Code A, Else I want to do Code B.Below is the
implementation of our "what shirt to wear" problem.
temperature = 50
If temperature > 70 Then
document.write("Wear a T-Shirt!")
document.write("Wear a long-sleeved shirt!")
Wear a long-sleeved shirt!
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